Selected index not reset with min-length="1" load-on-empty="true" load-on-focus="true" select-first-match="false"

[potatopeelings]

The previous selected index is retained with min-length="1" load-on-empty="true" load-on-focus="true" select-first-match="false"

Code

<tags-input ng-model="tags" add-on-paste="true">
  <auto-complete source="loadTags($query)" min-length="1" load-on-empty="true" load-on-focus="true" select-first-match="false"></auto-complete>
</tags-input>

https://plnkr.co/edit/lipGx6AXp554ScnlQ5Mh?p=preview

Steps

1. Focus on the text field and type in t
2. Press the down arrow to select Tag4
3. Press backspace to (seemingly) reset the match list and selection
4. Type in t again
5. Press the down arrow
   Expected: Tag4 is selected
   Actual: Tag5 is selected. The next iteration would select Tag6 and so on

Version of ngTagsInput you are using: v3.2.0
Version of Angular you are using: 1.4.2
Browser (name and version) on which the bug occurs: Chrome 62

[potatopeelings]

I think it has to do with the index not getting reset in tagsInput.directive('autoComplete'

        self.show = function() {
            if (options.selectFirstMatch) {
                self.select(0);
            }
            else {
                self.selected = null;
                // needs "self.index = -1;"?
            }
            self.visible = true;
        };

But I'm not familiar enough with the code to raise a PR.

By the way, the Plnkr link in the Github bug template seems to be broken and the Plnkr links from the ng-tags demos page need https for the src files to work when opened in Plnkr. Cheers!

Thanks for open sourcing this directive - its awesome!